COA_Ch07_Pretest

The signals exchanged between a sender and a receiver is called a ______________

• protocol
• prototype
• message
• rule

The large computer systems use an intelligent type of DMA interface known as ______________

• I/O channel
• memory-mapped I/O
• interrupt-driven I/O
• memory I/O

______________are divisions of concentric circles called tracks in disk drives.

• Sectors
• Segments
• Paths
• Symmetry

If a read/write head in Rigid Disk Drives were to touch the surface of the disk, the disk would become unusable. This condition is known as a ___________________

• head crash
• head corrupt
• head clean
• head burn

Lineal spaces between the pits in a CD-ROM are called ____________

• tracks
• segments
• lands
• circles

Electrical signal loss over time or distance during data transfer is called an _______________.

• attention
• attribute
• attenuation
• attendention

DVDs rotate at about ______________ times the speed of CDs.

• two
• Three
• four
• five

Systems that require high availability and must be able to tolerate more than one concurrent drive failure use________________.

• RAID 1
• RAID 2
• RAID 3
• RAID 6

______________ devices offer another approach to transcend the limits of magnetic storage.

• Micro-electronic-mechanical
• Micro-electro-magnetic
• Micro-electro-mechanical
• Macro-electro-mechanical

MTTR means

• Mean Time To Repeat
• Mean Time To Repair
• Mean Time To Report
• Median Time To Repair